Enhanced droop control method capable of improving transient stability of inverter
A technology of transient stability and control method, which is applied in the equal direction of the irreversible DC power input conversion to AC power output, which can solve the problems of the virtual power angle easily destabilizing stability margin, reduction, loss of transient stability, etc.
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[0078] The embodiment incorporates the infinite system with a single inverter (such as figure 1 (shown) as an example, the single-machine infinite system is used for simulation, and the current adopts the d-axis current priority limiting method, and its limiting value is I max = 1.05, see Table 2 for other parameters used in the simulation. Inverter with P 0 =0.7 start, at t=2s, the external power grid voltage from fell to And recover to at t=5s Taking the traditional droop control as the control group, the effectiveness of the proposed enhanced droop control method for improving the transient stability of the inverter is tested.
[0079] Table 2 The parameter values of some system variables in the simulation verification of the embodiment
[0080]
[0081]
[0082] When using the enhanced droop control method for improving the transient stability of the inverter, Figure 6 — Figure 9 The simulation waveforms using this control method are given, as well as t...
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